The synthesis of CB[8]/ZnO composites materials with enhanced photocatalytic activities
Enhancing the separation of hole-electron pairs is one of the valid pathway to enhance the photocatalytic degradation performance of semiconductors. In this work, cucurbit[8]uril/zinc oxide (CB[8]/ZnO) composites were prepared. The structure, morphology, surface elements and optical properties of th...
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Elsevier
2019-05-01
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| Series: | Heliyon |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2405844019314033 |
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| author | Lan Li Lin Liu Zhuang Li Danling Hu Chao Gao Jinyan Xiong Wei Li |
| author_facet | Lan Li Lin Liu Zhuang Li Danling Hu Chao Gao Jinyan Xiong Wei Li |
| author_sort | Lan Li |
| collection | DOAJ |
| description | Enhancing the separation of hole-electron pairs is one of the valid pathway to enhance the photocatalytic degradation performance of semiconductors. In this work, cucurbit[8]uril/zinc oxide (CB[8]/ZnO) composites were prepared. The structure, morphology, surface elements and optical properties of the composite are characterized by powder X-ray diffraction, scanning electron microscopy, Fourier transform infrared spectroscopy, X-ray photoemission spectroscopy, thermogravimetric analysis, and specific surface area measurements. In the photocatalytic degradation of 500 mg/L reactive brilliant red X-3B and 400 mg/L reactive yellow X-RG solutions, the rate constant of the CB[8]/ZnO composite is six times that of pure ZnO. A possible photocatalytic degradation mechanism is proposed. Zn2+ ions chelate with the carbonyl group of CB[8] on the surface of CB[8]/ZnO. Under ultraviolet-visible light irradiation, the generated holes of ZnO are transferred to and trapped on the CB[8] units to facilitate the separation of electron-hole pairs, improving the photocatalytic performance of this system. |
| first_indexed | 2024-12-13T03:45:26Z |
| format | Article |
| id | doaj.art-81f4010fe89b484dace398ab1df3f516 |
| institution | Directory Open Access Journal |
| issn | 2405-8440 |
| language | English |
| last_indexed | 2024-12-13T03:45:26Z |
| publishDate | 2019-05-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Heliyon |
| spelling | doaj.art-81f4010fe89b484dace398ab1df3f5162022-12-22T00:00:50ZengElsevierHeliyon2405-84402019-05-0155e01714The synthesis of CB[8]/ZnO composites materials with enhanced photocatalytic activitiesLan Li0Lin Liu1Zhuang Li2Danling Hu3Chao Gao4Jinyan Xiong5Wei Li6Hubei Key Laboratory of Biomass Fiber and Eco-dyeing &F inishing, College of Chemistry and Chemical Engineering, Wuhan Textile University, Wuhan 430073, ChinaHubei Key Laboratory of Biomass Fiber and Eco-dyeing &F inishing, College of Chemistry and Chemical Engineering, Wuhan Textile University, Wuhan 430073, ChinaHubei Key Laboratory of Biomass Fiber and Eco-dyeing &F inishing, College of Chemistry and Chemical Engineering, Wuhan Textile University, Wuhan 430073, ChinaHubei Key Laboratory of Biomass Fiber and Eco-dyeing &F inishing, College of Chemistry and Chemical Engineering, Wuhan Textile University, Wuhan 430073, ChinaCorresponding author.; Hubei Key Laboratory of Biomass Fiber and Eco-dyeing &F inishing, College of Chemistry and Chemical Engineering, Wuhan Textile University, Wuhan 430073, ChinaCorresponding author.; Hubei Key Laboratory of Biomass Fiber and Eco-dyeing &F inishing, College of Chemistry and Chemical Engineering, Wuhan Textile University, Wuhan 430073, ChinaCorresponding author.; Hubei Key Laboratory of Biomass Fiber and Eco-dyeing &F inishing, College of Chemistry and Chemical Engineering, Wuhan Textile University, Wuhan 430073, ChinaEnhancing the separation of hole-electron pairs is one of the valid pathway to enhance the photocatalytic degradation performance of semiconductors. In this work, cucurbit[8]uril/zinc oxide (CB[8]/ZnO) composites were prepared. The structure, morphology, surface elements and optical properties of the composite are characterized by powder X-ray diffraction, scanning electron microscopy, Fourier transform infrared spectroscopy, X-ray photoemission spectroscopy, thermogravimetric analysis, and specific surface area measurements. In the photocatalytic degradation of 500 mg/L reactive brilliant red X-3B and 400 mg/L reactive yellow X-RG solutions, the rate constant of the CB[8]/ZnO composite is six times that of pure ZnO. A possible photocatalytic degradation mechanism is proposed. Zn2+ ions chelate with the carbonyl group of CB[8] on the surface of CB[8]/ZnO. Under ultraviolet-visible light irradiation, the generated holes of ZnO are transferred to and trapped on the CB[8] units to facilitate the separation of electron-hole pairs, improving the photocatalytic performance of this system.http://www.sciencedirect.com/science/article/pii/S2405844019314033Materials chemistry |
| spellingShingle | Lan Li Lin Liu Zhuang Li Danling Hu Chao Gao Jinyan Xiong Wei Li The synthesis of CB[8]/ZnO composites materials with enhanced photocatalytic activities Heliyon Materials chemistry |
| title | The synthesis of CB[8]/ZnO composites materials with enhanced photocatalytic activities |
| title_full | The synthesis of CB[8]/ZnO composites materials with enhanced photocatalytic activities |
| title_fullStr | The synthesis of CB[8]/ZnO composites materials with enhanced photocatalytic activities |
| title_full_unstemmed | The synthesis of CB[8]/ZnO composites materials with enhanced photocatalytic activities |
| title_short | The synthesis of CB[8]/ZnO composites materials with enhanced photocatalytic activities |
| title_sort | synthesis of cb 8 zno composites materials with enhanced photocatalytic activities |
| topic | Materials chemistry |
| url | http://www.sciencedirect.com/science/article/pii/S2405844019314033 |
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